CN107643176B - Main machine structure of overspeed test stand - Google Patents
Main machine structure of overspeed test stand Download PDFInfo
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- CN107643176B CN107643176B CN201711052049.1A CN201711052049A CN107643176B CN 107643176 B CN107643176 B CN 107643176B CN 201711052049 A CN201711052049 A CN 201711052049A CN 107643176 B CN107643176 B CN 107643176B
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- 238000007667 floating Methods 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The invention discloses a main machine structure of an overspeed test bed, wherein an upper bearing seat and a lower bearing seat are respectively and fixedly connected to the top end of a casing and the bottom end of a motor seat, an upper angular contact bearing is arranged in the upper bearing seat, a shaft sleeve ring is sleeved on a rotor, an upper floating ring is sleeved on the rotor, an upper spring is arranged in the upper bearing seat, and the upper floating ring is abutted against the outer ring of the upper angular contact bearing; the lower angular contact bearing is arranged in the lower bearing seat, the shaft end sleeve is fixedly connected to the bottom end of the rotor, the sleeve opening of the shaft end sleeve is abutted to the inner ring of the lower angular contact bearing, the lower floating ring is sleeved on the rotor, the lower spring is arranged in the lower bearing seat, the bottom end of the lower spring is abutted to the lower floating ring, and the lower floating ring is abutted to the outer ring of the lower angular contact bearing. The arrangement mode of the stress direction of the upper angular contact bearing is changed, so that the bearing can not be damaged when the stress is the stress direction in normal operation during the disassembly of the inner ring and the outer ring of the bearing.
Description
Technical field:
The invention relates to a host structure of an overspeed test stand.
The background technology is as follows:
at present, the angular contact bearings of the rotor are arranged according to the relative stress direction of the bearings, so that no influence is caused on actual work, but when the bearings are disassembled and replaced, due to the high-speed precise bearings, the rotor, the bearings and the bearing seats are tightly matched (as shown in fig. 1 and 2), so that when the upper bearing seat 31 is pulled out to disassemble the bearings, the outer ring of the upper angular contact bearing 21 in the upper bearing seat 31 is driven to move in the direction opposite to the normal stress direction of the bearings (as shown in fig. 3), and the inner ring and the outer ring of the upper bearing seat 31 are easily separated, so that the bearings are damaged.
In addition, since the position of the outer ring of the upper angular contact bearing 21 in the conventional upper bearing seat 31 is fixed (as shown in fig. 2), the rotor 13 may slightly float up and down due to the change of the axial force caused by the rotation speed of the impeller in the actual working process, so that the inner ring of the upper angular contact bearing 21 floats up and down along with the rotor, and the outer ring of the upper angular contact bearing 21 is fixed, the inner ring and the outer ring are slightly separated axially, so that the service life of the bearing is relatively affected, although the bearing is not damaged.
The invention comprises the following steps:
the invention provides a host machine structure of an overspeed test stand for solving the problems in the prior art.
The invention adopts the technical scheme that: the motor seat is fixed on the shell, the stator is fixed in the shell, the rotor is rotatably supported in the stator, the upper angular contact bearing and the lower angular contact bearing are sleeved at two ends of the rotor, the motor overspeed test bench also comprises an upper bearing seat, an upper spring, an upper floating ring, a shaft sleeve ring, a lower bearing seat, a lower spring, a lower floating ring and a shaft end sleeve, the upper bearing seat and the lower bearing seat are respectively and fixedly connected at the top end of the shell and the bottom end of the motor seat, the upper angular contact bearing is arranged in the upper bearing seat, the shaft sleeve ring is sleeved on the rotor, the shaft sleeve ring is in interference fit with the rotor, one end of the shaft sleeve ring is abutted to the inner ring of the upper angular contact bearing, and the other end of the shaft sleeve ring extends into the upper bearing seat; the upper floating ring is sleeved on the rotor, the upper spring is arranged in the upper bearing seat, the top end of the upper spring is abutted to the upper floating ring, and the upper floating ring is abutted to the outer ring of the upper angular contact bearing;
The lower angular contact bearing is arranged in the lower bearing seat, the shaft end sleeve is fixedly connected to the bottom end of the rotor, the sleeve opening of the shaft end sleeve is abutted to the inner ring of the lower angular contact bearing, the lower floating ring is sleeved on the rotor, the lower spring is arranged in the motor seat, the bottom end of the lower spring is abutted to the lower floating ring, and the lower floating ring is abutted to the outer ring of the lower angular contact bearing.
Further, a first boss portion is arranged on the upper bearing seat, a second boss portion is arranged on the first boss portion, and an upper positioning step hole matched with the first boss portion and the second boss portion is formed in the machine shell.
Further, a first step hole with two step surfaces is arranged in the axis direction of the upper bearing seat, a sealing groove is arranged on the step surface at the upper end of the first step hole, and an upper spring mounting groove is arranged on the step surface at the lower end of the first step hole.
Further, protruding sealing parts are arranged at two ends of the shaft collar and extend into the sealing groove.
Further, protruding locating parts are arranged at two ends of the upper floating ring and are abutted against the outer ring of the upper angular contact bearing.
The invention has the following beneficial effects:
1) The arrangement mode of the stress direction of the upper angular contact bearing is changed, so that the stress is the stress direction during normal operation and the bearing is not damaged when the inner ring and the outer ring of the bearing are detached;
2) The one end of upper angular contact bearing outer lane is fixed to replace current both ends fixed, can make upper angular contact bearing outer lane follow the upper and lower slight floating on the inner race, and the arrangement of upper spring also makes upper angular contact bearing inner and outer race when floating from top to bottom keeps synchronous and does not take place the separation.
Description of the drawings:
FIG. 1 is a prior art overspeed test stand host machine configuration.
Fig. 2 is a view showing a structure of the upper angular contact bearing in the upper bearing housing in the main machine structure of fig. 1.
Fig. 3 is a force-bearing structure diagram of the upper angular contact bearing in the main machine structure of fig. 1 when the inner ring and the outer ring are disassembled.
FIG. 4 shows the structure of the host machine of the overspeed test stand of the present invention.
Fig. 5 and 6 are enlarged views of the installation of the upper angular contact bearing of the present invention.
Fig. 7 shows the structure of the upper bearing block, upper floating ring and shaft collar of the present invention.
Fig. 8 is an enlarged view of the installation of the lower angular contact bearing of the present invention.
The specific embodiment is as follows:
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 4 to 8, the invention discloses a main machine structure of an overspeed test stand, comprising a casing 11, a stator 12, a rotor 13, a motor base 14, an upper angular contact bearing 21, a lower angular contact bearing 22, an upper bearing seat 31, an upper spring 32, an upper floating ring 33, a sleeve ring 34, a lower bearing seat 41, a lower spring 42, a lower floating ring 43 and a shaft end sleeve 44, wherein the motor base 14 is fixed at the bottom end of the casing 11, the stator 12 is fixed in the casing 11, the rotor 13 is rotatably supported in the stator 12, and the upper angular contact bearing 21 and the lower angular contact bearing 22 are sleeved at two ends of the rotor 13. The upper bearing seat 31 is fixedly connected to the top end of the casing 11, and the lower bearing seat 41 is fixedly connected to the bottom end of the motor seat 14.
The upper angular contact bearing 21 is arranged in the upper bearing seat 31, the shaft sleeve ring 34 is sleeved on the rotor 13, and the shaft sleeve ring 34 is in interference fit with the rotor 13. One end of the shaft collar 34 abuts against the inner ring of the upper angular contact bearing 21, and the other end extends into the upper bearing housing 31. The upper floating ring 33 is sleeved on the rotor 13, the upper spring 32 is arranged in the upper bearing seat 31, the top end of the upper spring 32 is abutted on the upper floating ring 33, and the upper floating ring 33 is abutted on the outer ring of the upper angular contact bearing 21.
The lower angular contact bearing 22 is arranged in the lower bearing seat 41, the shaft end sleeve 44 is fixedly connected to the bottom end of the rotor 13, the sleeve opening of the shaft end sleeve 44 is abutted to the inner ring of the lower angular contact bearing 22, the lower floating ring 43 is sleeved on the rotor 13, the lower spring 42 is arranged in the motor seat 14, the bottom end of the lower spring 42 is abutted to the lower floating ring 43, and the lower floating ring 43 is abutted to the outer ring of the lower angular contact bearing 22.
The upper bearing housing 31 in the present invention is provided with a first boss portion 311, a second boss portion 312 is provided on the first boss portion 311, the second boss portion 312 and the upper bearing housing 31 are coaxially provided, and the diameter of the first boss portion 311 is larger than the diameter of the second boss portion 312. Correspondingly, an upper positioning step hole matched with the first boss portion 311 and the second boss portion 312 is provided on the housing 11.
In order to facilitate positioning and mounting of the upper angular contact bearing 21, a first stepped hole 310 having two stepped surfaces (an upper end stepped surface a and a lower end stepped surface B) is provided in the axial direction of the upper bearing housing 31, a seal groove 3101 is provided on the upper end stepped surface a of the first stepped hole 310, an upper spring mounting groove 3102 is provided on the lower end stepped surface B of the first stepped hole 310, and an upper spring 32 is placed in the upper spring mounting groove 3102.
To ensure the sealing effect, protruding sealing portions 341 are provided at both ends of the sleeve ring 34, and the protruding sealing portions 341 extend into the seal groove 3101. The protruding sealing portion 341 is matched with the sealing groove 3101, so that dust can be effectively prevented from entering the upper angular contact bearing 21, and the rotation effect is affected. The boss ring 34 is provided with a boss positioning table 342, and the boss positioning table 342 abuts against the inner ring of the upper angular contact bearing 21.
Protruding positioning parts 331 are provided at both ends of the upper floating ring 33, and the protruding positioning parts 331 abut against the outer ring of the upper angular contact bearing 21. The upper floating ring 33 can increase the contact area between the upper spring 32 and the upper angular contact bearing 21, and if the upper spring 32 is directly used to prop against the outer ring of the upper angular contact bearing 21, the outer ring of the bearing is worn, and on the other hand, the end face of the upper spring 32 cannot be fully contacted with the end face of the outer ring of the bearing due to the small area of the outer ring of the bearing. The upper floating ring 33 can ensure that the buffer force of the free end of the upper spring end 32 is fully applied to the outer ring of the upper angular contact bearing 21.
The structure and function of the lower floating ring 43 in the present invention are the same as those of the upper floating ring 33, and thus will not be described again.
The upper spring 32 in the present invention is a soft spring. The weight of the rotor 13 is about 50N, and the number of soft springs is 4, the force when a single soft spring is compressed is 10N, and the resultant force is 40N. When the rotor is still installed in the main machine, the weight of the rotor 13 is larger than the spring force of the upper spring 32, so that the upper spring is completely pressed into the upper spring installation groove 3102 of the upper bearing seat 31, and the upper floating ring 33 is in contact with the lower end step surface B of the upper bearing seat, namely, the rotor realizes axial positioning.
The soft spring only works in two cases:
1) The upper end of the rotor is provided with the impeller, the impeller is manually pulled upwards when the impeller is replaced every time, because the impeller is tightly matched with the rotor, the impeller is pulled upwards by a relatively large force, the rotor is driven to move upwards (the moving amount is not large, the moving amount is determined by the force for pulling the impeller and is not larger than the stroke of the lower pre-tightening spring at maximum, the axial distance between the lower floating ring and the motor base is 1mm, that is, the rotor is pulled upwards at most, namely, the rotor moves upwards to enable the lower floating ring to be in contact with the motor base, but in the practical impeller removing or working process, the upward axial force is generally impossible, but the upward floating of 0.01-0.1mm is still possible), and the lower pre-tightening spring is contracted. At this time, the upward movement of the rotor drives the inner ring of the upper angular contact bearing to move upward, so that the inner ring and the outer ring of the upper angular contact bearing are not slightly separated, and the soft spring pushes the upper floating ring (the upper floating ring is in clearance fit with the bearing seat hole in a loose way), so that the upper floating ring pushes the outer ring of the upper bearing to move upward to keep synchronous upward movement with the inner ring.
2) In addition, when the overspeed test bed is used for overspeed tests of several impellers, each impeller can generate certain axial force in the overspeed process, but the axial force is different, so that different axial forces bring different upward floating displacement amounts of the rotor, but because of the action of the soft springs, the floating displacement does not exceed the working stroke of the soft springs by 2mm, and the three impellers are supposed to respectively enable the rotor to float upwards by 0.1,0.2 and 0.3mm, at the moment, the outer ring can be pushed by the soft springs to move upwards by corresponding distances, so that the upper angular contact bearing cannot be separated from the inner ring and the outer ring due to upward movement of the inner ring.
The lower spring 42 in the present invention is a pre-tightening spring, which is used in a general mechanical bearing structure, because if the pre-tightening spring is not used, the upper and lower angular contact bearings are rigidly positioned, and the inner and outer rings of the angular contact bearings need to have a certain contact stress in the working process, the pre-tightening spring compresses the inner and outer rings, and the pre-tightening force can be adjusted, so that the compression amount of the spring can be determined. If the pre-tightening spring is not used, the upper and lower angular contact bearings are of a rigid positioning structure, the inner and outer rings can be tightly pressed, the abrasion to the balls is serious, the rolling balls can be loose, the fit of the inner and outer rings is loose, the radial shake of the rotor is increased, namely the dynamic balance of the rotor is poor, and the rotor is easy to resonate.
When in use, the upper angular contact bearing 21 is upwards in the axial stress direction of the rotor, and the lower angular contact bearing 22 is downwards in the axial stress direction of the rotor. When the upper angular contact bearing 21 is disassembled, the upper bearing housing 31 is disassembled to disassemble the upper angular contact bearing 21. In the process of pulling out the upper bearing seat 31, the step surface B at the lower end of the upper bearing seat 31 pushes the outer ring of the upper angular contact bearing 21, and along with the upward movement of the outer ring of the upper angular contact bearing 21, the stress direction of the outer ring pushing the inner ring at the moment is the stress direction of the inner ring and the outer ring of the upper angular contact bearing, so that the inner ring can be driven to be detached from the rotor 13 together. When the upper bearing seat 31 is detached, the upper bearing seat 31 is pulled up, and the lower end step surface B of the upper bearing seat 31 abuts against the outer ring of the upper angular contact bearing 21, so that the upper angular contact bearing 21 is peeled off from the rotor.
In addition, the upper angular contact bearing 21 is placed in the upper bearing housing 31, and if the rotor 13 slightly floats downward during operation, the inner ring of the upper angular contact bearing 21 presses the outer ring, and the outer ring abuts against the lower end step surface B of the upper bearing housing 31, so that the upper angular contact bearing works normally. When the rotor 13 floats upward, the inner ring of the upper angular contact bearing 21 moves upward, and at this time, the upper spring 32 may move upward along with the inner ring against the outer ring of the upper angular contact bearing 21, so that the inner and outer rings of the upper angular contact bearing 21 are not separated. At the same time, the upper spring 32 can keep the inner ring and the outer ring of the upper angular contact bearing 21 from being separated when the impeller is disassembled and the rotor moves slightly upwards.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (3)
1. The utility model provides an overspeed test stand host computer structure, includes casing (11), stator (12), rotor (13), motor cabinet (14), goes up angular contact bearing (21) and lower angular contact bearing (22), motor cabinet (14) are fixed in on casing (11), and stator (12) are fixed in casing (11), and rotor (13) rotate and support in stator (12), go up angular contact bearing (21) and lower angular contact bearing (22) cover and locate rotor (13) both ends, its characterized in that: the novel motor rotor is characterized by further comprising an upper bearing seat (31), an upper spring (32), an upper floating ring (33), a shaft sleeve ring (34), a lower bearing seat (41), a lower spring (42), a lower floating ring (43) and a shaft end sleeve (44), wherein the upper bearing seat (31) and the lower bearing seat (41) are respectively and fixedly connected to the top end of the casing (11) and the bottom end of the motor seat (14), an upper angular contact bearing (21) is arranged in the upper bearing seat (31), a shaft sleeve ring (34) is sleeved on the rotor (13), the shaft sleeve ring (34) is in interference fit with the rotor (13), one end of the shaft sleeve ring (34) is abutted to the inner ring of the upper angular contact bearing (21), and the other end of the shaft sleeve ring (34) extends into the upper bearing seat (31); the upper floating ring (33) is sleeved on the rotor (13), the upper spring (32) is arranged in the upper bearing seat (31), the top end of the upper spring (32) is abutted against the upper floating ring (33), and the upper floating ring (33) is abutted against the outer ring of the upper angular contact bearing (21);
The lower angular contact bearing (22) is arranged in the lower bearing seat (41), the shaft end sleeve (44) is fixedly connected to the bottom end of the rotor (13), the sleeve opening of the shaft end sleeve (44) is abutted against the inner ring of the lower angular contact bearing (22), the lower floating ring (43) is sleeved on the rotor (13), the lower spring (42) is arranged in the motor seat (14), the bottom end of the lower spring (42) is abutted against the lower floating ring (43), and the lower floating ring (43) is abutted against the outer ring of the lower angular contact bearing (22);
The upper bearing seat (31) is provided with a first boss part (311), the first boss part (311) is provided with a second boss part (312), and the shell (11) is provided with an upper positioning step hole matched with the first boss part (311) and the second boss part (312);
A first step hole (310) with two step surfaces is arranged in the axial direction of the upper bearing seat (31), a sealing groove (3101) is arranged on the step surface at the upper end of the first step hole (310), and an upper spring mounting groove (3102) is arranged on the step surface at the lower end of the first step hole (310);
The upper springs (32) are soft springs, the weight of the rotor (13) is 50N, the number of the soft springs is 4, the force when the single soft springs are pressed is 10N, and the resultant force is 40N.
2. The overspeed test stand host structure of claim 1 wherein: two ends of the shaft sleeve ring (34) are provided with protruding sealing parts (341), and the protruding sealing parts (341) extend into the sealing groove (3101).
3. The overspeed test stand host structure of claim 2 wherein: two ends of the upper floating ring (33) are provided with protruding positioning parts (331), and the protruding positioning parts (331) are abutted against the outer ring of the upper angular contact bearing (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052049.1A CN107643176B (en) | 2017-10-30 | 2017-10-30 | Main machine structure of overspeed test stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052049.1A CN107643176B (en) | 2017-10-30 | 2017-10-30 | Main machine structure of overspeed test stand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107643176A CN107643176A (en) | 2018-01-30 |
| CN107643176B true CN107643176B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711052049.1A Active CN107643176B (en) | 2017-10-30 | 2017-10-30 | Main machine structure of overspeed test stand |
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| CN (1) | CN107643176B (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05263824A (en) * | 1992-03-18 | 1993-10-12 | Fanuc Ltd | Bearing device for electric motor |
| CN1597201A (en) * | 2004-08-09 | 2005-03-23 | 湖南大学 | Sliding bearing type electric main shaft |
| CN101307541A (en) * | 2007-05-20 | 2008-11-19 | 张家港海锅重型锻件有限公司 | Seal device |
| CN102322439A (en) * | 2011-09-14 | 2012-01-18 | 大连金地机电工程有限公司 | Seal structure of floating ring |
| CN202579711U (en) * | 2012-06-06 | 2012-12-05 | 浙江优联汽车轴承有限公司 | Automobile clutch release bearing |
| DE102011116703A1 (en) * | 2011-10-24 | 2013-04-25 | Franz Kessler Gmbh | Motor-driven machine tool unit for computer numerical control machine, has storage unit which is functioned as movable bearing of rotor shaft, and expansion devices that are placed on movable bearing, at installed state |
| CN103401344A (en) * | 2013-07-02 | 2013-11-20 | 衡阳市大地泵业有限责任公司 | Submersible motor with easily disassembled angular contact ball bearing |
| CN203348000U (en) * | 2013-06-24 | 2013-12-18 | 佛山市顺德区中意液压有限公司 | Hydraulic motor oil dispensing mechanism with multi-azimuth compensating function |
| CN103999334A (en) * | 2011-12-23 | 2014-08-20 | 罗伯特·博世有限公司 | Electric machine having an axial prestress between a rolling bearing and a housing part, and method for operating such an electric machine |
| CN203933226U (en) * | 2014-05-15 | 2014-11-05 | 衡阳市大地泵业有限责任公司 | A kind of submersible motor that can fast dismantle angular contact ball bearing |
| CN203962692U (en) * | 2014-07-26 | 2014-11-26 | 慈溪市特种轴承有限公司 | Single-column type roller bearing |
| CN104697795A (en) * | 2015-02-12 | 2015-06-10 | 兰州理工大学 | Bearing fault predicating test system |
| CN104912507A (en) * | 2015-05-26 | 2015-09-16 | 中海石油(中国)有限公司 | Underwater horizontal Christmas tree body center hole sealing device |
| CN204942054U (en) * | 2015-09-11 | 2016-01-06 | 南京磁谷科技有限公司 | A kind of main machine structure preventing dust from directly entering bearing |
| CN106015585A (en) * | 2016-07-29 | 2016-10-12 | 广西科技大学 | Floating ring-magnetofluid sealing device |
| CN106208460A (en) * | 2016-07-14 | 2016-12-07 | 广东威灵电机制造有限公司 | Rotor, motor and air-conditioner |
| CN207423515U (en) * | 2017-10-30 | 2018-05-29 | 南京磁谷科技有限公司 | A kind of overspeed test bench main machine structure |
-
2017
- 2017-10-30 CN CN201711052049.1A patent/CN107643176B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05263824A (en) * | 1992-03-18 | 1993-10-12 | Fanuc Ltd | Bearing device for electric motor |
| CN1597201A (en) * | 2004-08-09 | 2005-03-23 | 湖南大学 | Sliding bearing type electric main shaft |
| CN101307541A (en) * | 2007-05-20 | 2008-11-19 | 张家港海锅重型锻件有限公司 | Seal device |
| CN102322439A (en) * | 2011-09-14 | 2012-01-18 | 大连金地机电工程有限公司 | Seal structure of floating ring |
| DE102011116703A1 (en) * | 2011-10-24 | 2013-04-25 | Franz Kessler Gmbh | Motor-driven machine tool unit for computer numerical control machine, has storage unit which is functioned as movable bearing of rotor shaft, and expansion devices that are placed on movable bearing, at installed state |
| CN103999334A (en) * | 2011-12-23 | 2014-08-20 | 罗伯特·博世有限公司 | Electric machine having an axial prestress between a rolling bearing and a housing part, and method for operating such an electric machine |
| CN202579711U (en) * | 2012-06-06 | 2012-12-05 | 浙江优联汽车轴承有限公司 | Automobile clutch release bearing |
| CN203348000U (en) * | 2013-06-24 | 2013-12-18 | 佛山市顺德区中意液压有限公司 | Hydraulic motor oil dispensing mechanism with multi-azimuth compensating function |
| CN103401344A (en) * | 2013-07-02 | 2013-11-20 | 衡阳市大地泵业有限责任公司 | Submersible motor with easily disassembled angular contact ball bearing |
| CN203933226U (en) * | 2014-05-15 | 2014-11-05 | 衡阳市大地泵业有限责任公司 | A kind of submersible motor that can fast dismantle angular contact ball bearing |
| CN203962692U (en) * | 2014-07-26 | 2014-11-26 | 慈溪市特种轴承有限公司 | Single-column type roller bearing |
| CN104697795A (en) * | 2015-02-12 | 2015-06-10 | 兰州理工大学 | Bearing fault predicating test system |
| CN104912507A (en) * | 2015-05-26 | 2015-09-16 | 中海石油(中国)有限公司 | Underwater horizontal Christmas tree body center hole sealing device |
| CN204942054U (en) * | 2015-09-11 | 2016-01-06 | 南京磁谷科技有限公司 | A kind of main machine structure preventing dust from directly entering bearing |
| CN106208460A (en) * | 2016-07-14 | 2016-12-07 | 广东威灵电机制造有限公司 | Rotor, motor and air-conditioner |
| CN106015585A (en) * | 2016-07-29 | 2016-10-12 | 广西科技大学 | Floating ring-magnetofluid sealing device |
| CN207423515U (en) * | 2017-10-30 | 2018-05-29 | 南京磁谷科技有限公司 | A kind of overspeed test bench main machine structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107643176A (en) | 2018-01-30 |
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